HEX与BIN转换

来源：互联网发布：网络服务器租用价格编辑：程序博客网时间：2024/05/22 00:50

string Hex2Bin(const string strHex)
{
string strBinValue;
for(int i = 0 ; i < strHex.length(); i++)
{
  switch(strHex[i])
  {
  case '0':
   strBinValue += "0000";
   break;
  case '1':
   strBinValue += "0001";
   break;
  case '2':
   strBinValue += "0010";
   break;
  case '3':
   strBinValue += "0011";
   break;
  case '4':
   strBinValue += "0100";
   break;
  case '5':
   strBinValue += "0101";
   break;
  case '6':
   strBinValue += "0110";
   break;
  case '7':
   strBinValue += "0111";
   break;
  case '8':
   strBinValue += "1000";
   break;
  case '9':
   strBinValue += "1001";
   break;
  case 'a':
   strBinValue += "1010";
   break;
  case 'b':
   strBinValue += "1011";
   break;
  case 'c':
   strBinValue += "1100";
   break;
  case 'd':
   strBinValue += "1101";
   break;
  case 'e':
   strBinValue += "1110";
   break;
  case 'f':
   strBinValue += "1111";
   break;
  case 'A':
   strBinValue += "1010";
   break;
  case 'B':
   strBinValue += "1011";
   break;
  case 'C':
   strBinValue += "1100";
   break;
  case 'D':
   strBinValue += "1101";
   break;
  case 'E':
   strBinValue += "1110";
   break;
  case 'F':
   strBinValue += "1111";
   break;
  };
}
return strBinValue;
}

string Bin2Hex(const string strBin4)
{
if(strBin4.length() != 4)
return "";

if(strBin4 == "0000")
  return "0";
if(strBin4 == "0001")
  return "1";
if(strBin4 == "0010")
  return "2";
if(strBin4 == "0011")
  return "3";
if(strBin4 == "0100")
  return "4";
if(strBin4 == "0101")
  return "5";
if(strBin4 == "0110")
  return "6";
if(strBin4 == "0111")
  return "7";
if(strBin4 == "1000")
  return "8";
if(strBin4 == "1001")
  return "9";
if(strBin4 == "1010")
  return "A";
if(strBin4 == "1011")
  return "B";
if(strBin4 == "1100")
  return "C";
if(strBin4 == "1101")
  return "D";
if(strBin4 == "1110")
  return "E";
if(strBin4 == "1111")
  return "F";
return "";
}